Underwater time service and synchronization method and system thereof

Abstract

The invention discloses an underwater time service and synchronization method and a system thereof, wherein a server can provide a precise time benchmark, and a user can calibrate a local clock by interacting information with the server, particularly, the method comprises the following steps: when the user needs to calibrate a clock, the user sends an application signal to a server-side with the sending time as the starting point of the time service; when the service-side receives the application signal, the service-side carries out the time-reversal treatment, acquires a response signal and returns the response signal to the user-side, and the service-side further sends the precise sending time of the response signal to the user in an underwater acoustic communication manner; since the time-reversal mirror has the characteristics of temporal and spatial focusing, the response signal can be focused at the user-side; and the user-side carries out the convolution operation on the received signal and the original application signal to obtain a timing signal; accordingly, the finishing point of the time service can be accurately determined by the timing signal, while the sending time of the response signal from the server-side is exactly the center time point of the entire process of the time service. By taking advantages of the very characteristics, the invention can achieve the real-time time service and synchronization.

Description

technical field [0001] The invention relates to the field of underwater acoustic communication, in particular, a method and system for realizing accurate underwater timing and synchronization by utilizing underwater acoustic information interaction. Background technique [0002] An accurate time reference is very important for many underwater applications. In the underwater acoustic communication network, it is the basis of system synchronization; in the collection of marine environmental data, ocean exploration, pollution monitoring, and disaster warning, it is the guarantee of data validity; in the underwater navigation and positioning system, it is the basis for affecting positioning One of the important parameters of precision. However, there are still some defects in the existing underwater real-time timing and synchronization technology. [0003] Because high-frequency electromagnetic wave signals rapidly attenuate in seawater and cannot be transmitted over long dist...

AI Technical Summary

Problems solved by technology

[0019] The purpose of the present invention is to propose a new underwater timing and synchronization method and its system in view of the defects in the prior art, so as to solve the problem that the traditional method is affected by the multi-path and fluctuation effect of the underwater acoustic channel, thereby effectively improving timing and synchronization. synchronization accuracy and reduce the complexity of the timing system

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